× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.



David

This is a common situation - commitment control might help here, but one idea is to read the record (not for update, or use the (N) extender to release the lock), wherever you are, and put the values into some holding tank. Then, just before you update it, read it again for update with the lock - compare the values to what you got the first time - if changed, well, do whatever you have to. Maybe send a message, maybe something else.

This is an ancient technique!!

Regards
Vern

David FOXWELL wrote:
-----Message d'origine-----
De : rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] De la part de Charles Wilt
procedures. Also by definition, it's up to the programmer to
not only ensure that any global variables are used correctly,
but to define "correctly" in the first place!

Charles,

What about this kind of scenario :

Procedure P1 in a test program reads File1 and updates a record R1.

Later, another programmer writes P2 that also affects the same record, although that might be a completely unrelated task to that of P1.

The result of the test on procedure P1 might be lost, or worse, it may be assumed to be correct when it is actually the procedure P2 which is inducing the expected result.


As an Amazon Associate we earn from qualifying purchases.

This thread ...

Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.